Cutting mechanism for printing machine folders



July 19, 1932. J, TOMLlN CUTTING MECHANISM FOR PRINTING MACHINE FOLDERSFiled July 10, 1951 Viz/02. .4

IN-YENTOR Patented July 19, 1932 UNITED STATES PATENT OFFICE" f FOHN R.TOMLIN, OF BROOKLYN, NEW YORK, ASSIGNOR TO B. HOE & 00., INCL, OF, NEW

YORK, N. Y., A CORPORATION OF NEW YORK 'i CUTTING MECHANISM FOR FRINTINGMAGHINE FOLDERS' Application filed July 10, 1931. Serial'No. 549,374.

This invention relates to certain improvements in cutting blocks orrubbers for printing machine folders of that class in WlllCh a long anda short sheet are cut and as- 5 sembled.

In certain types of cutting mechanism used for this purpose, arotarycutter is used in which one of the cutting knives is mounted slightlyless than 180 behind the other, so

that the knives or blades reach the cutting position at different pointson the cooperating collecting and folding cylinder. Furthermore, thesecutting blocks or rubbers are apt to fill up with paper strips orribbons and other dirt, and this interferes with the cuttin operation.

I t is the especial object of the present invention to improve theconstruction of these cutting blocks or rubbers so that long and shortsheets may be cut, and at the same time the blocks are self clearing ofpaper strips, dust, dirt or the like.

It is a further object of the invention to produce a block or rubberwhich is of few parts, and one that can be quickly and easily assembledand disassembled for repair or other purpose.

With these and other objects not specifically referred to in view, theinvention consists in certain novel parts, arrangements and combinationswhich will be described in connection with the annexed drawing and thenovel features pointed out in the claims hereunto appended.

In the drawing,

Figure 1 is a sectional view, partly broken away, showing a cuttingcylinder and cooperatlng abutment shown in the form of a collectingcylinder embodying the invention; Figure 2 is a perspective View, partlybroken away and partly in section, of one form of the improved cuttingrubber or block;

Figure 3 is a broken side View and Figure 4 a cross section on line 4 ofFigure 3 showing in detail one means of constructing and assembling theparts of the block;

Figure 5 is a broken side View and Figure 6 a sectional View on line 5of Figure 5 showing a modification in the meansof constructis providedset at a little less than 180? beto relations.

As shown, the cutting cylinder is markedlandtis provided withcutt'ingknives or blades 2, one of which is shown, it being understood thatanother-cutting knife hind the first knife or blade. The cooperatingabutment for the knife 2 is a collecting cylinder 3 provided with theusual sheet tak ing pins 4.

This collecting cylinder is provided with acutting block or rubber'ofimproved .con-

. struction which may embody'the invention in various forms, two ofwhich'are shown. Referring first to Figures 1130 4;, this rubber ismulti-part and includes a metal sheathing 5, 6, which is supported 011shoulders 7 in a recess in the cylinder wall marked-8. Located in thisrecess are three sections, preferably of rubber, marked 9, 10 and11,these being separated so that the cutting blade may pass betweenthem, as indicated in Figure 1, the sections compressing the rubbers. Itwill be noted that with this construction the cutting blade entersdeeply into the block so that it will cut a thick product, and at thesametime clears the blockof paper: strips, dirt and the like, as willnowbe explained.

The two outside rubbers 9 and 11 are cut away inwardly, as. indicatedatlQ, to 'form spaced clearances through which paper blade,these'clearances connecting with vents V 18 in the cylinder wall, sothat therubbish forced into the cylinder may readily be removed in anysuitable manner.

Between the cut-out portions 12 of-the rubbers 9 and 11, there are leftbosses 14, perforated as shown at 15, in Figure 4, which receivethreaded pins 16 by which the parts of the block are assembled with andheld in T position in the casing 1, before referred to, this form ofconstruction being shown in Figure 2. In Figures 5 and 6, a modificationof this construction is shown, in which instead of the bossesbeingformed integral Iwhich. may be desirable u'ndercertaincircumstances. Ashere shown, the sheathing block or box 7 in thismodification encloses a pair of rubber blocks 19, 20, the lower adjacentfaces of which are cut away, as indicated at 21, to form a recess intowhich the 7 cutting knife or blade forces any paper vstrips, dirt,etcz'This recess'communicates with a vent 22 through which this foreignmaterial may pass inside the cylinder, and,

may be withdrawn as above described. The

plurality of resilient elements, the inner faces of which are recessedto provide a clearance through which paper strips, dirt and the like areforced by the cutting blade to clear the block.

5. In a cutting mechanism for paper making machines, a folding cylinderhaving a recess, a cutting block consisting of a plurality of resilientelements the inner faces of which are recessed to provide a clearancethrough which paper'strips and the like are forced by the cutting blade,and a vent in the cylinder wall and communicating with the recessbetween the resilient elements.

In testimony whereof, I have hereunto set -my hand. i

' V JOHN R. TOMLIN parts of the block maybe held together by the screwbolt 23. V 7

It will be seen from the foregoing that a simple but effective cuttingblock or rubber has been produced, one which can readily be assembled ordismantledfor repair or other reason, and one which isself clearing.lVhile the invention has been shown in its preferred forms, it will, beunderstood that certain changes in the structure shown and described maybe made without departing from the invention as defined in the appendedclaims.

What I claim is:

1. In a cutting mechanism for printing l 1 machine folders, thecombination of a cutter block composed of a plurality of adjacentresilient elements, the 7 two outer elements having inner recessed facesto provide clear ances through which paper strips, dirt, and

the like are forced by the cutting blade to 7 clear the block.

2. In a cutting mechanism for printing machine folders, the combinationof a cutter block composed of a plurality of adjacent resilientelements, the two outer elements having their inner faces recessed atintervals With inwardly extending projections between the jcutouts andpins passing through the projections and holding the parts of the blockin assembled position.

3. In a cutting mechanism for printing machine folders, the combinationof a cutter-block composed of a plurality of adjacent resilientelements, the two' outer ele ments having their inner faces recessed atintervals to, form clearances, bushings be- 7 tween the intervals, andpins passing through the bushings and holding the parts of the block inassembled position.

- 4-. In a cutting-niechanismfor paper mak- 7 ing machines, a cutterblock composed of a

